import sys
from PyQt5.QtWidgets import QMessageBox,QPushButton,QApplication,QWidget
app=QApplication(sys.argv)
widget=QWidget()
def showMsg():
 QMessageBox.information(widget,'信息提示框','Ok 彈出測(cè)試信息')
btn=QPushButton('測(cè)試點(diǎn)擊按鈕',widget)
btn.clicked.connect(showMsg)
widget.show()
sys.exit(app.exec_())

from PyQt5.QtCore import QObject,pyqtSignal
#信號(hào)對(duì)象
class QTypeSignal(QObject):
 #定義一個(gè)信號(hào)
 # sendmsg = pyqtSignal(object)
 #todo 優(yōu)化 多個(gè)參數(shù)傳遞
 sendmsg=pyqtSignal(str,str)
 def __init__(self):
 super(QTypeSignal, self).__init__()
 def run( self ):
 #發(fā)射信號(hào)
 #self.sendmsg.emit('hell')
 #todo 優(yōu)化 發(fā)射多個(gè)參數(shù)
 self.sendmsg.emit('第一參數(shù)','第二個(gè)參數(shù)')
#槽對(duì)象
class QTypeSlot(QObject):
 def __init__(self):
 super(QTypeSlot, self).__init__()
 #槽對(duì)象中的槽函數(shù)
 # def get( self,msg ):
 # print("QSlot get msg => " + msg)
 #todo 優(yōu)化 多個(gè)參數(shù)
 def get( self,msg1,msg2 ):
 print("QSlot get msg => " + msg1+' '+msg2)
if __name__ == '__main__':
 #實(shí)例化信號(hào)對(duì)象
 send=QTypeSignal()
 #實(shí)例化槽對(duì)象
 slot=QTypeSlot()
 #1
 print('_____-把信號(hào)綁定到槽函數(shù)上_____')
 send.sendmsg.connect(slot.get)
 send.run()
 print('_____-把信號(hào)與槽函數(shù)解綁_____')
 send.sendmsg.disconnect(slot.get)
 send.run()

@PyQt5.QtCore.pyqtSlot(參數(shù))
def on_發(fā)送者對(duì)象名稱(chēng)_發(fā)射信號(hào)名稱(chēng)(self,參數(shù))：
 pass

...
class Window(QWidget):
 def __init__(self, *args, **kwargs):
 super().__init__(*args, **kwargs)
 self.setWindowTitle('裝飾器信號(hào)與槽')
 self.resize(500, 500)
 self.move(400, 200)
 self.btn = QPushButton('按鈕', self)
 self.init_ui()
 
 def init_ui(self):
 self.btn.clicked.connect(self.btn_hand)
 
 @staticmethod
 def btn_hand():
 print('使用connect點(diǎn)擊了按鈕')
...

...
class Window(QWidget):
 def __init__(self, *args, **kwargs):
 super().__init__(*args, **kwargs)
 self.setWindowTitle('裝飾器信號(hào)與槽')
 self.resize(500, 500)
 self.move(400, 200)
 self.btn = QPushButton('按鈕', self)
 self.init_ui()
 # 要在加載組件后使用
 QMetaObject.connectSlotsByName(self)
 
 def init_ui(self):
 # 這個(gè)地方定義的名字直接在下面使用
 self.btn.setObjectName('btn')
 
 @pyqtSlot()
 def on_btn_clicked(self):
 print('使用裝飾器點(diǎn)擊了按鈕')